---
title: "CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-43529/
description: "CVE-2025-43529 (Apple Multiple Products): Exploited in the wild (CISA KEV). A use-after-free issue was addressed with improved memory management. This issue…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-12-17
date_modified: 2026-09-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-43529"
kev: true
cvss: 8.8
epss: 0.08763
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Apple Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-12-15, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-01-05 ; treat that as the outer limit, not the target.
- EPSS 8.8% , percentile 95: FIRST’s model estimates a 8.8% chance of exploitation activity in the next 30 days, higher than 95% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

## What it is

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.

## Affected products (CVE record)

- Apple Safari: < 26.2
- Apple iOS and iPadOS: < 18.7.3, < 26.2
- Apple macOS: < 26.2
- Apple tvOS: < 26.2
- Apple visionOS: < 26.2
- Apple watchOS: < 26.2

## Severity

- CISA-ADP CVSS 3.1: 8.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-12-15; federal due date 2026-01-05. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 8.76% probability of exploitation activity in the next 30 days; percentile 95.

## Sources

- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/125884)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/125892)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/125885)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/125886)
- [Listed in CISA KEV notes (support.apple.com)](https://support.apple.com/en-us/125889)
- [CVE.org record CVE-2025-43529](https://www.cve.org/CVERecord?id=CVE-2025-43529)
- [NVD entry CVE-2025-43529](https://nvd.nist.gov/vuln/detail/CVE-2025-43529)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43529)
- [support.apple.com](https://support.apple.com/en-us/125890)
- [support.apple.com](https://support.apple.com/en-us/125891)

---
Source page: https://erroneo.us/security/cve/CVE-2025-43529/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt